A society of enthusiasts could help steer people towards museums or other activities in their area that need help. Just as the BAPC network groups now, the society could help focus individuals.

To summarise my various posts on this and the Society for the Protection of Aviation History threads.

Please do not under estimate the time, commitment and paperwork involved in becoming a properly constituted Society that will be required if you are to be taken seriously as a campaigning group.

Perhaps the existing structures / museums provide the quickest and cost-effective route.